Fast 3-D Geo-Electromagnetic Inversion Based on Quasi-LinearApproximation

基于拟线性逼近的快速三维地电磁反演

• 批准号: 9614136
• 负责人: Michael Zhdanov
• 金额: $ 10.7万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-02-01 至 1999-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614136&HistoricalAwards=false
• 关键词: Fast; Geo; Electromagnetic; Inversion; Based

9614136 Zhdanov Electromagnetic (EM) probing of the earth is one of the major tools for surveying underground structures and the technique is used to map the earth from the crust to the mantle. Applications include geological mapping, mineral and oil prospecting, tectonic and earthquake studies, and environmental assessment and monitoring. One of the most difficult problems of EM geophysical methods is the interpretation of EM data in areas with 3-D geo-electrical structures because of limitations of 3D forward modeling codes and ill-posedness of inversion procedures. Currently available EM techniques can handle only simple models and require supercomputer processing. The PI proposes to develop fast and stable 3-D geo-EM inversion methods that can be applied to real geophysical data using conventional PCs or Workstations using new methods based on quasi-linear approximations of the existing integral equation algorithms. ***

9614136日达诺夫电磁(EM)地球探测是探测地下结构的主要工具之一，该技术用于绘制从地壳到地幔的地球图。应用包括地质测绘、矿产和石油勘探、构造和地震研究以及环境评估和监测。由于三维正演模拟程序的局限性和反演方法的不适定性，电磁地球物理方法的最大难题之一是三维地电结构地区的电磁资料解释。目前可用的电磁技术只能处理简单的模型，需要超级计算机处理。PI建议开发快速稳定的三维地球电磁反演方法，这些方法可以应用于使用传统PC或工作站的实际地球物理数据，使用基于现有积分方程算法的准线性近似的新方法。***